obscurinervis - Toda, 1986 D. obscuripes - rimshaw, 1901 D. ocampoae - Ruiz-Fiegalan, 2003 D. occidentalis - Spencer, 1942 D. ocellata - Hardy and Kaneshiro, 1969 D. ochracea - Grimshaw, 1901 D. ochrifrons - Duda, 1924 D. ochrobasis - Hardy and Kaneshiro, 1968 D. ochrogaster - Chassagnard in Chassagnard and Groseille, 1992 D. ochropleura - Hardy and Kaneshiro in Hardy et al., 2001 D. odontophallus - Hardy and Kaneshiro, 1968 D. ogradi - Vela and Rafael, 2004 D. ogumai - Zannat and Toda, 2002 D. ohnishii - Zannat and Toda, 2002 D. okadai - Takada, 1959 D. okala - Magnacca and O'Grady, 2008 D. olaae - Grimshaw, 1901 D. omnivora - Magnacca and O'Grady, 2009 D. onca - Dobzhansky and Pavan, 1943 D. onychophora - Duda, 1927 D. ophthalmitis - Tsacas, 2007 D. opuhe - Magnacca in Magnacca and Price, 2012 D. orascopa - Magnacca and O'Grady, 2009 D. oreas - Hardy, 1965 D. oreia - Tsacas, 1980 D. orena - Tsacas and David, 1978 D. orestes - Hardy, 1965 D. oribatis - Tsacas, 1980 D. orientacea - Grimaldi, James and Jaenike, 1992 D. oritisa - Chen, 1990 D. orkui - Brncic and Koref-Santibanez, 1957 D. ornata - Meigen, 1830 D. ornata - Hardy and Kaneshiro, 1969 D. ornatifrons - Duda, 1927 D. ornatipennis - Williston, 1896 D. orosa - Bock and Wheeler, 1972 D. orphnaea - Tsacas, 2001 D. orphnopeza - Hardy and Kaneshiro, 1968 D. orthofascia - Hardy and Kaneshiro, 1968 D. orthophallata - Katoh, Toda and Gao, in Katoh et al., 2018 D. orthoptera - Hardy, 1965 D. oshimai - Choo and Nakamura, 1973 D. othoni - Pipkin, 1964 D. ovilongata - Gupta and Gupta, 1991 P D. pachea - Patterson and Wheeler, 1942 D. pachneissa - Tsacas, 2002 D. pachuca - Wasserman, 1962 D. padangensis - Zhang and Toda in Zhang, Toda and Watabe, 1995 D. paenehamifera - Hardy and Kaneshiro, 1969 D. pagliolii - Cordeiro, 1963 D. pagoda - Toda, 1988 D. paharpaniensis - Singh, Dash and Fartyal, 2004 D. painii - Singh and Negi, 1995 D. pallidifrons - Wheeler in Wilson et al., 1969 D. pallidipennis - Dobzhansky and Pavan, 1943 D. pallidosa - Bock and Wheeler, 1972 D. pallipes - Dufour, 1846 D. palmata - Takada, Momma and Shima, 1973 D. palniensis - Hegde and Shakunthala in Hegde et al., 1999 D. palustris - Spencer, 1942 D. panamensis - Malloch, 1926 D. pandora